Some(most) people actualize principles of satanism without identifying as such. Hence, not self proclaimed. Just basing it from people who are making noise (as satanists) not many Trump supporters I think we agree.
Most self proclaimed satanists are indistinguishable from algae haired activists as far as I can tell. Doesn't seem like a Trump thing. Unless they are doing some kind of false flag o9a **** to funnel people his way...